Particle properties of sugar maple hemicellulose hydrolysate and its influence on growth and metabolic behavior of Pichia stipitis

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논문

Particle properties of sugar maple hemicellulose hydrolysate and its influence on growth and metabolic behavior of Pichia stipitis

학술지

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

저자명

Sun, Z.; Shupe, A.; Liu, T.; Hu, R.; Amidon, T.E.; Liu, S.

초록

In this study the influence of the insoluble solids in nano-filtrated sugar maple hemicellulosic hydrolysate on the metabolic behavior of Pichia stiptis was investigated. The particle properties of hemicellulosic hydrolysate were analyzed. Phosphoric acid and ammonium (PA) were applied to remove the particles. The metabolic behavior and growth property of P. stipitis in particle - removed hydrolysate was measured. Results demonstrated that the average particle size and zeta potential of the untreated hydrolysate were 2266.9+/-78.2nm and -6.09+/-0.49mV. Xylose consumption and ethanol production rate were significantly decreased when particle content is greater than 1.63g/L. Because the majority of particles (34g/L) were removed from hydrolysates by phosphoric acid and ammonium treatment, the fermentability of the hydrolysate was significantly improved. These results indicated particles play an important role in hydrolysate inhibition effect.

발행연도

2011

발행기관

Elsevier Applied Science

ISSN

0960-8524

권

102

호

페이지

pp.2133-2136

DOI